Özet:

Ukraine is a large agricultural country with grain production of more than 60 million tons. At that, the percentage of tilled agricultural land reaches 80%, and in some regions even exceeds 90%. The environmental imbalance of agricultural production is becoming more evidentwith the increasing destructive tendencies in the land use. The problem of soil fertility loss is of particular relevance under present conditions. On the one hand, this problem is caused by the high percentage of tilled agricultural land in the territory of Ukraine and the intensive use of the eroded lands, but, on the other hand, by insufficientlyhigh farming culture andrapid growth of deficiency in organic substance and basic soil nutrients (Kolisnyk, 2019; Tsyhanskyi et al., 2019). According to the statistical bulletin of Ukraine, the areas where corn was grown in Ukraine in 2015-2017 reached 4.3-4.7 mln ha, and Ukraine occupied the leading positionin the world in 2016 in grain production, producing 28.07 mln t, with an average yield in the country of 66.0 t/ha (Kolisnyk, 2019; Kolisnyk, 2016). Therefore, modern agrotechnologies in agriculture are the important factors in improving crop productivity and preserving soil fertility. Modern technologies being used in the competitive agricultural crop production are the means of functioning of sustainable systems in agriculture. It is possible to improve the efficiency and stability of agriculture only due to the introduction of intensive crop growing technologies. The latest technologies contribute to a more efficient use of the potential of modern varieties and hybrids, and increase yields and their quality by influencing the productive process of plant development. These technologies favour the optimization of production costs with regard to the ecological safety of the environment and maintain the relative agroecosystem balance (Palamarchuk et al., 2010; Kolisnyk, 2007; Butenko et al., 2019). Long-termexperiments indicate that the potential of the new corn hybrids hasn’t beenused quite enough (Kolisnyk, 2016; Khodanitska, 2020). The realization of its genetic potential will significantly increase the seed production and stimulate the development of the processing industry. Taking into account the biological characteristics of new corn hybrids and the development of new technologies for their growing, there arises the need to optimize the interaction of the hybrid with the available hydrothermal environmental resources and the arranged factors, which will ensure a more complete realization of their potential in the specific region.    Keywords: Grain; Corn; Hybrid; Foliar feeding; Maturity group; Growth and development stage; Crop yield  References Kolisnyk, O. M. (2019). Creation of simple corn hybrids with various disease and pest resistance. Irrigated agriculture: an interagency thematic scientific collection. - Kherson: OLD-PLUS.Vol. 71. - P. 71-75. Palamarchuk, V. D., Klymchuk, O. V., Polishchuk, I. S., Kolisnyk, O. M. (2010). Ecobiological and technological principles in the cultivation of field crops: textbook. Vinnytsia, 680 p. Tsyhanskyi, V. I., Didur, I. M., Tsyhanska, O. I., Malynka, L. V., Butenko, A. O., Masik, I. M., Klochkova, T. I. (2019). Effect of the cultivation technology elements on the activation of plant microbe symbiosis and the nitrogen transformation processes in alfalfa agrocoenoses. Modern Phytomorphology 13: - P. 30–34. https: //doi.org/10.5281/zenodo.20190107 Kolisnyk, O. M. (2016). Stability of self-pollinated corn lines to ustilagozeae and sphacelo thecareilina. Breeding and genetic science and education. Proceedings of the International Conference (March 16-18, 2016). - P. 134-137. Butenko, A. O., Sobko, M. G., Ilchenko, V. O., Radchenko, M. V., Hlupak, Z. I., Danylchenko, L. M., Tykhonova, O. M. (2019). Agrobiological and ecological bases of productivity increase and genetic potential implementation of new buckwheat cultivars in the conditions of the Northeastern Forest-Steppe of Ukraine. Ukrainian Journal of Ecology, 9 (1), - P. 162-168. Kolisnyk, O. M., Liubar, V. A. (2007). Stability of the corn output material to Boil smut. Feedstuff and forage production. ??? 61. - P. 40-45. Khodanitska, O. O., Kolisnyk, O.M. (2020). Application of development additives in the practice of plant growing. Materiály XVI Mezinárodnív??decko – praktická konference «Modernívy mo?enostiv??dy», Vol. 10. Praha. Publishing House «Education and Science». - P. 45-49. Khodanitska, O. O., Kuryata, V. G., Shevchuk, O. A., Tkachuk, O. O., Poprotska, I. V. (2019). Effect of treptolem on morphogenesis and productivity of linseed plants. Ukrainian Journal of Ecology, 9, 2. P. 119-126. https: //www.ujecology.com/articles/effect-of-treptolem-on-morphogenesis-and-productivity-of-linseed-plants.pdf. Kolisnyk, O. M., Butenko, A. O., Malynka, L. V., Masik, I. M., Onychko, V. I., Onychko, T. O., Kriuchko, L. V., Kobzhev, O. M. (2019). Adaptive properties of corn forms for improvement in the ecological status of fields. Ukrainian J Ecol. 9: 33-37. Ivanov, M. I., Rutkevych, V. S., Kolisnyk, O. M., Lisovoy, I. O. (2019). Research of the influence of the parameters of the block-portion separator on the adjustment range of speed of operating elements. INMATEH - Agricultural Engineering. Vol. 57/1. - P. 37–44. https: //inmateh.eu/documents/2019.1/57-04-Abstract-Ivanov.pdf Kolisnyk, O. M., Kolisnyk, O. O., Vatamaniuk, O. V., Butenko, A. O., Onychko, V. I., Onychko, T. O., Dubovyk, V. I., Radchenko, M. V., Ihnatieva, O. L., Cherkasova, T. A. (2020). Analysis of strategies for combining productivity with disease and pest resistance in the genotype of base breeding lines of corn in the system of diallele crosses. Modern Phytomorphology 14: P. 49–55. DOI: https: //doi.org/10.5281/zenodo.190107 Palamarchuk, V. D., Kolisnyk, O. M. (2019). Stalk lodging resistance of corn hybrids depending on the planting date. Collection of scientific works of VNAU. Agriculture and forestry. ???15. - P. 94-110. Tsykov, V. S., Konoplia, N. Y., Masliiev, S. V. (2013). Corn for food and medicinal purposes: production and use. Luhansk: Shiko, OOO Virtual reality. 232 p. Karpenko, O. Yu., Rozhko, V. M., Butenko, A. O., Masyk, I. M., Malynka, L. V., Didur, I. M., Vereshchahin, I. V., Chyrva, A. S. and Berdin, S. I. (2019). Post-harvest siderates impact on the weed littering of maize, 9 (3), 300-303. DOI: 10.15421 / 2019_745 Ding, X., Yuan, Y., Liang, L. Li, Han. X. (2014). Impact of long-term application of manure, crop residue, and mineral fertilizer on organic carbon pools and crop yields in a mollisol. Journal of Soils and Sediments. 14 (5), 854–859. DOI: 10.1007/s11368-013-0840-x Didur, I. M., Tsyhanskyi, V. I., Tsyhanska, O. I., Malynka, L. V., Butenko, A. O., Klochkova, T. I. (2019). The effect of fertilizer system on soybean productivity in the conditions of right bank forest-steppe. Ukrainian Journal of Ecology, 9 (1), – P. 76–80. https: //www.ujecology.com/articles/the-effect-of-fertilizer-system-on-soybean-productivity-in-the-conditions-of-right-bank-foreststeppe.pdf Ryan, R. (2017). 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